Best grade engine oil?

Just wondering what the best grade engine oil to use in a 1990 8v GTi is? Haynes has a few to choose from, off the top of my head 10w40 and 15w40 and a few others, and Autodata reccomends 15w40.

Which one is best?

Cheers, Dan

 

Far to complex a question to give a 'best' answer to - just buy either recomended oil.

Background to oil ratings:

http://en.wikipedia.org/wiki/Viscosity_index

http://www.upmpg.com/tech_articles/motoroil_viscosity/

 

Cheers for the reply, I just wondered if there was a particular preference of oil that people used.

 

to be honest the most commonly used by the posters on here would be 10w40

 

Cheers mate, that means i dont have to buy new oil as its the same as my other car

 

yup, at one stage i had a mk3 16v, audi S4 and 1.8t that all used 5w40. i just bought 25L drums of it

 

Thats the way to do it

 

and the mk3 tended to drink about a litre every 1k miles

 

My Corsa eats oil, doesnt burn it and it doesnt leak it so **** knows where it goes Those engine are renouned for going through it though